Feel Rvaan's theory about putting all the hacking servers against each other may be flawed slightly. Also his theory about any server that has WvW players hacking should have everyone on the server banned : P
If you see Project Mayhem [PM] players, give them an earful!
Also the post I found on the official forums, alot of accusations being thrown around. https://forum-en.guildwars2.com/forum/pvp/wuvwuv/Yaks-bend-invader-orbs-hacking